Add error to specs for undocumented analytics event params (LG-5969)

[zachmargolis]

🎫 Ticket

LG-5969

🛠 Summary of changes

Adds code to the test suite that will error when undocumented params are sent to the track_event method.

Spec changes

There are two kinds of exceptions right now:

1. We seem to intentionally log extra undocumented params to make sure they get passed through
2. We have analytics methods that don't take params but do add extra stuff to the payload as new undocumented keys like so:

   identity-idp/app/services/analytics_events.rb

   Lines 948 to 953 in 84dcd52

   	def idv_doc_auth_randomizer_defaulted
   	track_event(
   	'IdV: doc_auth random vendor error',
   	error: 'document_capture_session_uuid_key missing',
   	)
   	end

So to get around that, we have some new spec metadata that can be used to annotate:

context 'some spec', allowed_extra_analytics: [:my_param_name] do
  it 'logs the stuff' do
    analytics.track_some_event(my_param_name: true)
  end
end

[zachmargolis]

Ok update! The new plan here is that I added the infra needed to error on unknown params (and even document string keys), but plumbing those through was a lot of work and very tedious so I added an escape valve:

allowed_extra_analytics: [:*]

and am annotating failing specs with those so we can address documentation in a more piecemeal fashion